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Common tiredness questions

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Why do I get tired after eating?

Feeling tired and sleepy after eating can be a normal bodily response. It can be caused by several factors, including:

  • hormones released during digestion
  • eating foods that contain the amino acid tryptophan, which can encourage sleepiness
  • lack of good quality sleep, which can make you feel more tired after eating
  • lack of regular exercise, which puts you at risk of low energy in general

Feeling tired after a meal can sometimes be a sign of an underlying medical condition, including:

Speak to your doctor if you regularly feel tired after eating.

Why can’t I sleep even though I’m tired?

If you cannot sleep even though you feel tired this is a sign of

. Insomnia is a condition in which a person has problems sleeping.

It can be caused by many things, including:

  • stress, anxiety or depression
  • noise
  • jet lag
  • shift work
  • a room that is too hot or cold
  • an uncomfortable bed
  • alcohol, caffeine or nicotine
  • recreational drugs, such as cocaine or ecstasy

How much caffeine is too much?

Most healthy adults can safely consume up to 400 milligrams (mg) of caffeine a day. This is equivalent to around four cups of brewed coffee, two energy drinks or 10 cans of cola.
However, the effect of caffeine on the body differs from person to person. You may need to cut down on caffeine if consuming caffeine causes symptoms, including:

You may also need to cut down on caffeine if you are taking certain medicines. Speak to your doctor or pharmacist to find out if caffeine may affect any medicines you are taking.

How should you sleep when you’re pregnant?

When you are pregnant, it is safest to go to sleep lying on your left or right side. This is because falling asleep on your back may affect blood flow and oxygen to a growing baby. Research suggests that, after 28 weeks, falling asleep on your back may double the risk of stillbirth.

The position you fall asleep in is the position most people sleep in for longest. Do not worry if you wake up on your back during the night. Instead, just turn over and go back to sleep on your side.

If sleeping on your side feels uncomfortable, try supporting your bump with pillows and putting a pillow between your knees.

Do antibiotics make you tired?

Tiredness is not a common side effect of taking

. However, different people respond differently to medicines. Speak with your doctor if you are worried about any side effects from taking antibiotics.

Why do I wake up tired?

Several sleep disorders can leave you feeling tired when you wake up. These include:

However, you may also feel tired on waking up due to conditions that cause general tiredness, including:

Why does my body feel weak?

Feeling weak can be caused by a wide variety of factors and conditions. Common causes of general weakness include:

Weakness in specific parts of the body may be caused by something different. Common causes of weakness in specific muscles include:

Does depression make you tired?

Yes, tiredness or low energy can be a symptom of


Want more tips on how to sleep like a baby? Try out our 28-day

sleep better plan for all the latest hacks on how to drift off more quickly and have better quality slumber. Currently available on iOS only.

Important: Our website provides useful information but is not a substitute for medical advice. You should always seek the advice of your doctor when making decisions about your health.